CN105790671A - Motor automatic control system based on signal processing circuit - Google Patents

Motor automatic control system based on signal processing circuit Download PDF

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Publication number
CN105790671A
CN105790671A CN201610209950.4A CN201610209950A CN105790671A CN 105790671 A CN105790671 A CN 105790671A CN 201610209950 A CN201610209950 A CN 201610209950A CN 105790671 A CN105790671 A CN 105790671A
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CN
China
Prior art keywords
audion
pole
processing circuit
circuit
electric capacity
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Pending
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CN201610209950.4A
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Chinese (zh)
Inventor
汤福琼
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Chengdu Kanuoyuan Technology Co Ltd
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Chengdu Kanuoyuan Technology Co Ltd
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Filing date
Publication date
Application filed by Chengdu Kanuoyuan Technology Co Ltd filed Critical Chengdu Kanuoyuan Technology Co Ltd
Priority to CN201610209950.4A priority Critical patent/CN105790671A/en
Publication of CN105790671A publication Critical patent/CN105790671A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters

Abstract

The invention discloses a motor automatic control system based on a signal processing circuit. The system is mainly composed of a power source, a power processing circuit connected with the power source, an inverter circuit connected with the power processing circuit, a motor and a driving circuit connected with the inverter circuit, a single-chip microcomputer connected with the driving circuit, a computer connected with the single-chip microcomputer through a CAN bus, and the like. The power processing circuit processes the working voltage of the motor, and the processed working voltage of the motor is very stable, so that the influence of voltage fluctuation on normal operation of the motor is avoided. The system is equipped with a signal processing circuit, which can filter signals acquired by a signal acquisition circuit and prevent interference signals from affecting motor control.

Description

A kind of motor automatic control system based on signal processing circuit
Technical field
The present invention relates to a kind of automatic control system, specifically refer to a kind of motor automatic control system based on signal processing circuit.
Background technology
Motor automatic control system is widely used in the fields such as machinery, iron and steel, mine, metallurgy, chemical industry, and in these industries, overwhelming majority manufacturing machine all adopts motor to make prime mover.Therefore, efficiently control motor, improve its runnability, national economy is of great practical significance.But existing electric machine control system is easily subject to the impact of voltage pulsation, make the motor cannot be properly functioning.
Summary of the invention
It is an object of the invention to the defect overcoming existing electric machine control system to be easily subject to voltage pulsation impact, it is provided that a kind of motor automatic control system based on signal processing circuit.
The purpose of the present invention is achieved through the following technical solutions: a kind of motor automatic control system based on signal processing circuit, main by power supply, the power supply processing circuit being connected with power supply, the inverter circuit being connected with power supply processing circuit, the motor being connected with inverter circuit respectively and drive circuit, the single-chip microcomputer being connected with drive circuit, and the computer composition being connected with single-chip microcomputer by CAN；In order to better implement the present invention, the present invention is additionally provided with the signal sample circuit being connected with motor and the signal processing circuit being serially connected between single-chip microcomputer and signal sample circuit.
nullFurther，Described signal processing circuit is by audion VT4，Audion VT5，Audion VT6，Negative pole is connected with the base stage of audion VT6、The electric capacity C9 of positive pole then ground connection，It is serially connected in the resistance R6 between the positive pole of electric capacity C9 and the colelctor electrode of audion VT5，Negative pole is connected with the colelctor electrode of audion VT5、Positive pole then forms the electric capacity C7 of the input of this signal processing circuit，Positive pole is connected with the colelctor electrode of audion VT5、The electric capacity C8 that negative pole is then connected with the colelctor electrode of audion VT4，It is serially connected in the resistance R7 between the base stage of audion VT4 and the base stage of audion VT6，It is serially connected in the inductance L4 between the emitter stage of audion VT5 and the colelctor electrode of audion VT6，One end is connected with the emitter stage of audion VT6、The resistance R8 of other end ground connection，And negative pole is connected with the colelctor electrode of audion VT6、Positive pole then sequentially forms through the electric capacity C10 electric capacity C11 being connected with the emitter stage of audion VT5 after resistance R9；The emitter stage of described audion VT4 is connected with the base stage of audion VT5；The colelctor electrode of described audion VT6 forms the outfan of this signal processing circuit and is connected with single-chip microcomputer；The input of described signal processing circuit is connected with the outfan of signal sample circuit.
Described power supply processing circuit, by transformator T, front end current rectifying and wave filtering circuit, is serially connected in the triggering circuit between front end current rectifying and wave filtering circuit and the former limit of transformator T and the output circuit composition being connected with the secondary of transformator T；The input of described power supply processing circuit is connected with power supply, its outfan is then connected with the power input of inverter circuit.
Described front end current rectifying and wave filtering circuit is by diode rectifier U, audion VT1, the electric capacity C1 that positive pole is connected with the cathode output end of diode rectifier U, negative pole is then connected with the emitter stage of audion VT1 after resistance R1, the diode D1 that N pole is connected with the negative pole of electric capacity C1, P pole is then connected with the emitter stage of audion VT1, and the diode D2 composition that N pole is connected with the positive pole of electric capacity C1, P pole is then connected with the emitter stage of audion VT1 after electric capacity C2；The emitter stage of described audion VT1 is connected with the cathode output end of diode rectifier U, and its colelctor electrode is then all connected with triggering circuit with base stage；The N pole of described diode D2 is also connected with triggering circuit；The input termination power of described diode rectifier U.
Described triggering circuit is by audion VT2, audion VT3, flip chip U1, N pole is connected with the non-name end of the former limit inductance coil L1 of transformator T, the diode D3 that P pole is then connected with the N pole of diode D2 after resistance R2, positive pole is connected with the N pole of diode D2, the electric capacity C5 that negative pole is then connected with the colelctor electrode of audion VT2, negative pole is connected with the colelctor electrode of audion VT1, the electric capacity C4 that positive pole is then connected with the colelctor electrode of audion VT2 after resistance R3, positive pole is connected with the base stage of audion VT1, the electric capacity C3 that negative pole is then connected with the VDD pin of flip chip U1, and N pole is connected with the colelctor electrode of audion VT3, the diode D4 composition that P pole is then connected with the colelctor electrode of audion VT1 after resistance R4；The BD pin of described flip chip U1 is connected with the P pole of diode D3 and the base stage of audion VT2 simultaneously, its SW pin is then connected with the emitter stage of audion VT2, its FB pin is then connected with the emitter stage of audion VT3, its CS pin is connected with the base stage of audion VT3, its GND pin be then connected with the P pole of diode D4 while ground connection；The former Same Name of Ends of limit inductance coil L1 of described transformator T is connected with the N pole of diode D2；The Same Name of Ends of the former limit inductance coil L2 of described transformator T is connected with the colelctor electrode of audion VT2 and the emitter stage of audion VT3 simultaneously, its non-same polarity ground connection.
Described output circuit is connected by the non-same polarity of P pole with the secondary inductance coil L3 of transformator T, N pole is then collectively forming the Zener diode D5 of outfan of this power supply processing circuit with the Same Name of Ends of the secondary inductance coil L3 of transformator T, and the electric capacity C6 composition of ground connection while positive pole is connected with the N pole of Zener diode D5, negative pole is connected with the Same Name of Ends of the secondary inductance coil L3 of transformator T after resistance R5；The outfan of described power supply processing circuit is connected with the power input of inverter circuit.
Described flip chip U1 is ACT365 integrated chip.
The present invention compared with the prior art, has the following advantages and beneficial effect:
(1) present invention adopts power supply processing circuit that the running voltage of motor is processed, and motor operating voltage after treatment becomes very stable, and voltage pulsation so then can be avoided to affect the properly functioning of motor.
(2) data are transmitted by the present invention by CAN, improve stability and the reliability of data transmission.
(3) present invention is provided with signal processing circuit, and its signal that can signal acquisition circuit be collected is filtered processing, it is to avoid the interference effect of signals present invention control accuracy to motor.
Accompanying drawing explanation
Fig. 1 is the overall structure block diagram of the present invention.
Fig. 2 is the structure chart of the power supply processing circuit of the present invention.
Fig. 3 is the structure chart of the signal processing circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As it is shown in figure 1, a kind of motor automatic control system based on signal processing circuit of the present invention, mainly by power supply, power supply processing circuit, inverter circuit, motor, drive circuit, single-chip microcomputer, signal sample circuit, signal processing circuit and computer form.
Wherein, power supply is 220V civil power, and it is for providing working power to motor.Power supply processing circuit is for processing 220V civil power, and exports smooth-going galvanic current, and its input is connected with power supply.Inverter circuit is then for being converted to smooth-going galvanic current alternating current drive motor work, and its power input is connected with the outfan of power supply processing circuit, and signal output part is then connected with motor.Single-chip microcomputer be the present invention Signal control Center, it is preferably ZXLD1320 type single-chip microcomputer, the CFB pin of this ZXLD1320 type single-chip microcomputer is connected with computer by CAN, its M-LOAD pin is then connected with the input of drive circuit, and its ISE pin is then connected with the outfan of signal processing circuit.Computer is then the human-computer exchange window of the present invention, is used for inputting control signal.Signal sample circuit is used for gathering motor torque output power signal, and its input is connected with motor.This signal processing circuit is for processing motor torque output power signal, and its input is connected with the outfan of signal sample circuit.The signal that drive circuit is then used for single-chip microcomputer to send flows to inverter circuit, and its outfan is then connected with the signal input part of inverter circuit.Described inverter circuit, drive circuit and signal sample circuit all adopt prior art can realize the present invention.
As in figure 2 it is shown, this power supply processing circuit is by transformator T, front end current rectifying and wave filtering circuit, it is serially connected in the triggering circuit between front end current rectifying and wave filtering circuit and the former limit of transformator T and the output circuit composition being connected with the secondary of transformator T；The input of described power supply processing circuit is connected with power supply, its outfan is then connected with the power input of inverter circuit.
Wherein, described front end current rectifying and wave filtering circuit is made up of diode rectifier U, audion VT1, resistance R1, electric capacity C1, electric capacity C2, diode D1 and diode D2.
During connection, the positive pole of electric capacity C1 is connected with the cathode output end of diode rectifier U, its negative pole is then connected with the emitter stage of audion VT1 after resistance R1.The N pole of diode D1 is connected with the negative pole of electric capacity C1, its P pole is then connected with the emitter stage of audion VT1.The N pole of diode D2 is connected with the positive pole of electric capacity C1, P pole is then connected with the positive pole of electric capacity C2.The negative pole of described electric capacity C2 is then connected with the emitter stage of audion VT1.The emitter stage of described audion VT1 is connected with the cathode output end of diode rectifier U, and its colelctor electrode is then all connected with triggering circuit with base stage.The N pole of described diode D2 is also connected with triggering circuit.The input termination power of described diode rectifier U.The unidirectional current that this front end current rectifying and wave filtering circuit is converted to smooth-going 220V civil power exports to triggering circuit.
Described triggering circuit is made up of audion VT2, audion VT3, flip chip U1, resistance R2, resistance R3, resistance R4, electric capacity C3, electric capacity C4, electric capacity C5, diode D3 and diode D4.
Wherein, the N pole of diode D3 be connected with the non-name end of the former limit inductance coil L1 of transformator T, its P pole then after resistance R2 N pole with diode D2 be connected.The positive pole of electric capacity C5 is connected with the N pole of diode D2, its negative pole is then connected with the colelctor electrode of audion VT2.The negative pole of electric capacity C4 is connected with the colelctor electrode of audion VT1, its positive pole is then connected with the colelctor electrode of audion VT2 after resistance R3.The positive pole of electric capacity C3 is connected with the base stage of audion VT1, its negative pole is then connected with the VDD pin of flip chip U1.The N pole of diode D4 is connected with the colelctor electrode of audion VT3, its P pole is then connected with the colelctor electrode of audion VT1 after resistance R4.
Simultaneously, the BD pin of described flip chip U1 is connected with the P pole of diode D3 and the base stage of audion VT2 simultaneously, its SW pin is then connected with the emitter stage of audion VT2, its FB pin is then connected with the emitter stage of audion VT3, its CS pin is connected with the base stage of audion VT3, its GND pin be then connected with the P pole of diode D4 while ground connection.The former Same Name of Ends of limit inductance coil L1 of described transformator T is connected with the N pole of diode D2.The Same Name of Ends of the former limit inductance coil L2 of described transformator T is connected with the colelctor electrode of audion VT2 and the emitter stage of audion VT3 simultaneously, its non-same polarity ground connection.This unidirectional current is be suitable for the voltage swing that makes of motor by transformator transformation after being triggered circuit, and the voltage swing after transformation is determined by the rated voltage of motor, rolls number and compares, by changing the coil of transformator, the output voltage size that can change transformator.In order to better implement the present invention, described flip chip U1 is preferably ACT365 integrated chip and realizes.
Described output circuit is connected by the non-same polarity of P pole with the secondary inductance coil L3 of transformator T, N pole is then collectively forming the Zener diode D5 of outfan of this power supply processing circuit with the Same Name of Ends of the secondary inductance coil L3 of transformator T, and the electric capacity C6 composition of ground connection while positive pole is connected with the N pole of Zener diode D5, negative pole is connected with the Same Name of Ends of the secondary inductance coil L3 of transformator T after resistance R5.The outfan of described power supply processing circuit is connected with the power input of inverter circuit.Unidirectional current after transformation flows to inverter circuit after output circuit processes, and the unidirectional current processed through output circuit becomes very stable.
As it is shown on figure 3, described signal processing circuit is made up of audion VT4, audion VT5, audion VT6, resistance R6, resistance R7, resistance R8, resistance R9, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10, electric capacity C11 and inductance L4.
During connection, the negative pole of electric capacity C9 is connected with the base stage of audion VT6, its positive pole then ground connection.Resistance R6 is serially connected between the positive pole of electric capacity C9 and the colelctor electrode of audion VT5.The negative pole of electric capacity C7 is connected with the colelctor electrode of audion VT5, its positive pole then forms the input of this signal processing circuit and is connected with the outfan of signal sample circuit.The positive pole of electric capacity C8 is connected with the colelctor electrode of audion VT5, its negative pole is then connected with the colelctor electrode of audion VT4.Resistance R7 is serially connected between the base stage of audion VT4 and the base stage of audion VT6.Inductance L4 is serially connected between the emitter stage of audion VT5 and the colelctor electrode of audion VT6.One end of resistance R8 is connected with the emitter stage of audion VT6, its other end ground connection.The negative pole of electric capacity C11 is connected with the colelctor electrode of audion VT6, its positive pole then sequentially after electric capacity C10 and resistance R9 emitter stage with audion VT5 be connected.Meanwhile, the emitter stage of described audion VT4 is connected with the base stage of audion VT5.The colelctor electrode of described audion VT6 forms the outfan of this signal processing circuit and is connected with single-chip microcomputer.The interference signal being entrained in motor torque output power signal is filtered by this signal processing circuit.
During work, operator input control instruction signal from computer, and this control instruction signal is transferred to single-chip microcomputer by CAN, and uniprocessor sends corresponding signal to drive circuit after receiving control instruction signal, drive circuit is transferred to inverter circuit signal.Power supply provides working power through inverter circuit to motor after power supply processing circuit processes simultaneously, the control instruction signal control motor operating that inverter circuit then inputs according to operator.At this moment signal sample circuit gathers motor torque output power signal, and it being transferred to signal processing circuit, this signal processing circuit is sent to single-chip microcomputer motor torque output power signal after the interference signal being entrained in motor torque output power signal is filtered.Single-chip microcomputer calculates the real-time output of motor according to the moment output power signal of feedback, and whether the real-time output of comparison is consistent with the power of setting, as inconsistent, send corresponding signal to drive circuit, drive circuit is transferred to inverter circuit signal again, motor is then controlled by inverter circuit again, until the real-time output of motor is consistent with the power of setting.
As it has been described above, just can well implement the present invention.

Claims (7)

1. the motor automatic control system based on signal processing circuit, main by power supply, the power supply processing circuit being connected with power supply, the inverter circuit being connected with power supply processing circuit, the motor being connected with inverter circuit respectively and drive circuit, the single-chip microcomputer being connected with drive circuit, by the computer that CAN is connected with single-chip microcomputer, and the signal sample circuit composition being connected with motor；It is characterized in that, between single-chip microcomputer and signal sample circuit, be also serially connected with signal processing circuit.
null2. a kind of motor automatic control system based on signal processing circuit according to claim 1，It is characterized in that: described signal processing circuit is by audion VT4，Audion VT5，Audion VT6，Negative pole is connected with the base stage of audion VT6、The electric capacity C9 of positive pole then ground connection，It is serially connected in the resistance R6 between the positive pole of electric capacity C9 and the colelctor electrode of audion VT5，Negative pole is connected with the colelctor electrode of audion VT5、Positive pole then forms the electric capacity C7 of the input of this signal processing circuit，Positive pole is connected with the colelctor electrode of audion VT5、The electric capacity C8 that negative pole is then connected with the colelctor electrode of audion VT4，It is serially connected in the resistance R7 between the base stage of audion VT4 and the base stage of audion VT6，It is serially connected in the inductance L4 between the emitter stage of audion VT5 and the colelctor electrode of audion VT6，One end is connected with the emitter stage of audion VT6、The resistance R8 of other end ground connection，And negative pole is connected with the colelctor electrode of audion VT6、Positive pole then sequentially forms through the electric capacity C10 electric capacity C11 being connected with the emitter stage of audion VT5 after resistance R9；The emitter stage of described audion VT4 is connected with the base stage of audion VT5；The colelctor electrode of described audion VT6 forms the outfan of this signal processing circuit and is connected with single-chip microcomputer；The input of described signal processing circuit is connected with the outfan of signal sample circuit.
3. a kind of motor automatic control system based on signal processing circuit according to claim 2, it is characterized in that: described power supply processing circuit is by transformator T, front end current rectifying and wave filtering circuit, it is serially connected in the triggering circuit between front end current rectifying and wave filtering circuit and the former limit of transformator T and the output circuit composition being connected with the secondary of transformator T；The input of described power supply processing circuit is connected with power supply, its outfan is then connected with the power input of inverter circuit.
4. a kind of motor automatic control system based on signal processing circuit according to claim 3, it is characterized in that: described front end current rectifying and wave filtering circuit is by diode rectifier U, audion VT1, positive pole is connected with the cathode output end of diode rectifier U, the electric capacity C1 that negative pole is then connected with the emitter stage of audion VT1 after resistance R1, N pole is connected with the negative pole of electric capacity C1, the diode D1 that P pole is then connected with the emitter stage of audion VT1, and N pole is connected with the positive pole of electric capacity C1, the diode D2 composition that P pole is then connected with the emitter stage of audion VT1 after electric capacity C2；The emitter stage of described audion VT1 is connected with the cathode output end of diode rectifier U, and its colelctor electrode is then all connected with triggering circuit with base stage；The N pole of described diode D2 is also connected with triggering circuit；The input termination power of described diode rectifier U.
null5. a kind of motor automatic control system based on signal processing circuit according to claim 4，It is characterized in that: described triggering circuit is by audion VT2，Audion VT3，Flip chip U1，N pole is connected with the non-name end of the former limit inductance coil L1 of transformator T、The diode D3 that P pole is then connected with the N pole of diode D2 after resistance R2，Positive pole is connected with the N pole of diode D2、The electric capacity C5 that negative pole is then connected with the colelctor electrode of audion VT2，Negative pole is connected with the colelctor electrode of audion VT1、The electric capacity C4 that positive pole is then connected with the colelctor electrode of audion VT2 after resistance R3，Positive pole is connected with the base stage of audion VT1、The electric capacity C3 that negative pole is then connected with the VDD pin of flip chip U1，And N pole is connected with the colelctor electrode of audion VT3、The diode D4 composition that P pole is then connected with the colelctor electrode of audion VT1 after resistance R4；The BD pin of described flip chip U1 is connected with the P pole of diode D3 and the base stage of audion VT2 simultaneously, its SW pin is then connected with the emitter stage of audion VT2, its FB pin is then connected with the emitter stage of audion VT3, its CS pin is connected with the base stage of audion VT3, its GND pin be then connected with the P pole of diode D4 while ground connection；The former Same Name of Ends of limit inductance coil L1 of described transformator T is connected with the N pole of diode D2；The Same Name of Ends of the former limit inductance coil L2 of described transformator T is connected with the colelctor electrode of audion VT2 and the emitter stage of audion VT3 simultaneously, its non-same polarity ground connection.
6. a kind of motor automatic control system based on signal processing circuit according to claim 5, it is characterized in that: described output circuit is connected by the non-same polarity of P pole with the secondary inductance coil L3 of transformator T, N pole is then collectively forming the Zener diode D5 of outfan of this power supply processing circuit with the Same Name of Ends of the secondary inductance coil L3 of transformator T, and the electric capacity C6 composition of ground connection while positive pole is connected with the N pole of Zener diode D5, negative pole is connected with the Same Name of Ends of the secondary inductance coil L3 of transformator T after resistance R5；The outfan of described power supply processing circuit is connected with the power input of inverter circuit.
7. a kind of motor automatic control system based on signal processing circuit according to claim 6, it is characterised in that: described flip chip U1 is ACT365 integrated chip.
CN201610209950.4A 2016-04-06 2016-04-06 Motor automatic control system based on signal processing circuit Pending CN105790671A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610209950.4A CN105790671A (en) 2016-04-06 2016-04-06 Motor automatic control system based on signal processing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610209950.4A CN105790671A (en) 2016-04-06 2016-04-06 Motor automatic control system based on signal processing circuit

Publications (1)

Publication Number Publication Date
CN105790671A true CN105790671A (en) 2016-07-20

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Application Number Title Priority Date Filing Date
CN201610209950.4A Pending CN105790671A (en) 2016-04-06 2016-04-06 Motor automatic control system based on signal processing circuit

Country Status (1)

Country Link
CN (1) CN105790671A (en)

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